Power-transmission device



Nv`. 1,19, 1929. i K. SHANKl v 1,736,291 V POWER TRANSMI SS ION DEVICE Filed March 24, 1928 Patented Nov. 19, 1929 KELLER SHANK, F BURLINGTON, NEW JERSEY POWER-TRANSBIISSION DEVICE Application led March 24, 1928. Serial No. 264,299.

My invention relates to' newy and useful improvements in a power transmission device and one of its objects is to provide a' power transmission for power propelled ve- '5 hicles, which, when connected to the power unit by suitable mechanism will cause' thevehicle to move. forward, slowly `at first, but with automatically increasing speed Auntil A full speed is attained, at which time the lo whole transmission mechanism rotates at thev same angular velocity 1n the same direction.

as the driving shaft, thus becoming a straight through directdrive which action will conn tinue until such time as the speed of the i driving shaft is reduced.

Another object of my invention is to provide in the device ay neutral position so that it will not .transmit motion to the driven shaft should the latter accidentally become connected to the power unit.V l

A further object of the invention is to provide a pair of endwise aligned shafts, one of which is the driving shaft and the other vthe driven shaft and to surround the meeting endsof these with a housing ink which is located certain trains of gearing comprising a pinion keyed to the driving shaft and meshing with two gears mounted on ends of dia- Y metrically located counter shafts journalled in bearings in the housing, Iother gears mounted on the opposite ends of the counter shafts and of less diameter than the gears on the other ends, the second mentioned gears Y, meshing with a pinion on the driven shaft 33 which pinion is of greater diameter than the first mentioned pinion, an internal or ring gear located between the other gears and c ar- .ried by the housing, which meshes with pinl ions on stub axles carried by a spider keyed 4) to the driven shaft, said last mentioned pinions, meshing with a shiftable pinion splined to the driving shaft. l

lith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to use and make the same, l will 59 describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, 1n which?- Fig. 1, is a sectional viewlof the power transmission device with parts left in elevation. v

Fig. 2, is an end viewlooking lfrom the driven end with the housing plate removed.

In carrying out my invention as'herein embodied, 3 represents the driving shaft and 4 the driven shaft in endwise alignment and about the meeting ends of said shaft is located a housing 5 andv here shown as comprising 'a circular body 6, although the shape is not essential, with both endsclosedby cover plates or caps Tand 8.

- @n the driving shaftB-is keyeda pinion 9 by means of the usual key waysand a key 10, said pinion 9 meshing with twogears 11 and 12 which are keyed to the counter shafts 13 and 14 respectively at one end therev l of by the usual key ways and keys 15.

The countershafts 13 and 14 are j ournalled in parts ofthe housing, as for instance, in the cover plates or caps 7 and 8 which are suitably fashioned to provide bearings therefor and on the opposite ends of these countershafts are keyed the gears 16 and 17iby means of the keys 18.

rlhe gears'lG and v17 are of sin-aller diameter than the Vgears 11 and 12 and therefore have a less number of teeth, but both of said gears 16 and 17 mesh with a pinion'19 keyed to the driven shaft 4 by the usual key way andkey 20. 4

The pinion 9 and gears 11 and 12 are spaced from the pinion 19and thefgears '16 and 17 and within this space is locatedl a spider 21 which is keyed to the driven shaft 4 by a key whichvmay be the saine one that secures the pinion 19 tov theV driven shaft.

and said spider carries stub axles and 23 i with a shiftable pinion 27 splinedon the V9 and in which they are slidably mounted with the outer ends of said rod connected to ythe collar '30 carried by the driving shaft f with which coacts the fork 31 or an equivalent having connection with the shaft lever 82 pivoted intermediate `its ends as at 33.' 1t is obvious from the foregoing that when the driving shaft is rotatedclockwise, ythe driven shaft being at rest and loaded, that the pinion 27 acting through the pinions 24 and l25 on the gear 26, will cause the `housing to rotate counter clockwise: the gears Y 11 and 12 will roll back on the pinion 9 and the gears 16 and 17 will rollback on the pinion 19.

The backward rotation Vof the housing is so limited, by the pinion 27 acting Athrough pinions 24 and 25 on gear 26, that only a por'ion of the rotaryV motion transmitted, by pinion 9 through gears 11 and 12 togears 1G and 17 can be expanded by them-in rolling back on the pinion 19, theremainder being utilized iny producingY clockwise rotation ofthe pinvion 19.

f As thepinion19 attains motion, the spider 21 is moved' 'zlockw'ise,y carrying Vwith it the pinions 24 and 25, thus reducing the motion being transmitted from pinion 27 to gear 26 Vand reducing the counter clockwise rotation of the housing and also reducing that portion ofthe rotary motion of gears 16 and 17 that is being expanded in rollingvr back on pinion 19an'd increasing that portion of the rotary motion of the gears 16 and 17 that is being. utilized. in transmitting clockwise mo? tion tothe pinion 19. Thus, as lthe clockwiser motion of the rhousing is reduced and likewise the rolling back of the gears 16 and 17 on said pinion 19 is reduced, while at the same time the motion transmitting action of the gears '16 and17U on the pinion 19. is in creased until'the pinion '19 and the spider 21 andthe pinions 24 and 25 are moving clockwise at the angular velocity of the pinion 27 at which time it becomes a direct drive.

If the pinion 27 is shifted out of mesh with y pinions 24 and 25, a neutral condition is attained which permits the housing to rotate freely counter clockwise, by action of the pinion 9y on the gears 11 and 12 of the gears 16 and `17 on the pinion 19, all the rotary motion of the gears 11 and 12 and 16V and 17 then being expanded in `rolling back on pinions 9.and 19 respectively.y Y

YIf the direction ofV rotation of the driving shaft is reversed,`as for instance through ordinary well known gear trains, the device will function to give a reverse motion in extion to the forward motion. i

Of Course I do not wish to be limited to the exact details of construction as herein shown, 1

as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is `1. A power transmission device comprising the combination of a driving shaft, a4

driven shaft in endwise alignment therewith, a housing mounted on the meeting ends of said shafts, a pinion fixed to the driving shaft within rthe housing, gears meshing therewith and fixed to counter shafts in the housing, other gears of less pitch diameter than the first mentioned ones also mount/cd on the counter shafts, a pinion fixed to ther driven shaft and of greater pitch diameter f thanlthe pinion on the driving shaft andv meshing with the last mentioned. gears,.and a tram ofV gears connected with both `shafts and the housing. y

y2. A power transmission device compris-` ing the combination of a driving shaft, a

driven shaftY in endwiseV alignment there-V with, a housing mounted on'the meeting ends of said shafts, a pinion fixed tothe driving shaft within the housing, Y gears meshing therewith and fixed to counter shafts in .the

housing, other gears of less pitch diameter than the first mentioned ones-also mounted on the counter shafts,"a pinion fixed to the driven shaft and of greater'pitch diameter than the pinion on the driving shaft and meshing with the lastmentioned gears, a spider fixed to the driven shaft, stub axles carried bysaid spider, pinions journalledon said stub axles, a ring gear secured to the housing and meshing with the', last mentioned pinions, and a shiftable pinion splined to the driving shaft and meshabl'e with said last mentioned pinions.

In testimony whereof, I have hereunto afxed my signature. y i y v f KELLERSHANK.

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